Increased Sound Level - Water Pump; Increased Sound Level - Compressor - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting

3.8. Increased sound level - water pump

Possible failures
Root cause category: installation
Water filter blocked.
Air in the water circuit.
Water pressure too low.
Water circuit partially blocked.
Root cause category: component - mechanical
Water pump mechanical prob-
lem.
Air Purge blocked - air trapped
in water system.

3.9. Increased sound level - compressor

Possible failures
Root cause category: component - mechanical
Compressor increased bear-
ing friction/bearing failure.
Unit produces (loud) noise or
shakes.
Root cause category: component - electrical
Expansion valve incorrect con-
trol - superheat too low.
Page 58
Daikin Altherma Monobloc CA
Root cause
Dirty water.
Not enough air purged.
• Water pressure not
checked during filling.
• Air was purged from the
water system after filling.
• Leakage.
Obstruction in the water sys-
tem.
Internal pump friction.
Component failure.
Root cause
• Bad lubrication of
compressor internal
rotating parts.
• Compressor at end of
lifetime.
• Refrigerant overcharge.
• Mixing of air in refrigerant
system.
• Refrigerant undercharge.
• Faulty thermistor.
• Faulty expansion valve
control.
3. Symptom based troubleshooting
Check
• Check water filter.
• Check water quality.
• Check if all air purge valves
are open.
• Check if air purge valves
are installed on all highest
points of the field installed
water circuit.
Check water pressure.
Check water circuit for block-
ages.
Check water pump (see
page 73).
Check air purge valve.
Check
No checks possible.
Check refrigerant.
• Check thermistors (see
page 88).
• Check the expansion valve
(see page 97).
Corrective action
Clean the water filter.
Purge air out of unit and field
supplied water system and
backup heater.
Adjust water pressure if
required (1 - 2 barg).
Remove possible blockages
and check the water quality.
Replace water pump.
Replace air purge valve.
Corrective action
Replace compressor.
After vacuum drying, charge
correct amount of refrigerant.
If required replace thermistors
(see page 124) or replace
expansion valve (see
page 131).
19/07/16